[Insane]
00:10:251 (1,2,3,4,5,6,7,8,9) - This pattern looks a bit randomly placed compared to the rest of this section. Maybe you could move 00:10:643 (2) - more to the right to create a back-and-forth pattern with similar angles?
https://osu.ppy.sh/ss/675511800:13:585 (2,3,4,5,6,7,8,9,10) - I'm not a really a fan of these rhythms (applies for the rest of the section as well). The reason for the high density here seems to be that one guitar-esque intrument (not sure what it really is) but it calls for double rhythms like you did in Hard, so I would recommend to change this measure's rhythm to something like this:
http://puu.sh/sIjHv/17bc633784.jpg00:34:761 (1,2,3,1) - This diamond-like movement didn't really feel intuitive since the rest of the map uses only sharp-angled movement for jumps. I expected to go to the top-left after (3) following this logic. Maybe you could rearrange the following patterns and place (1) like this somehow?
https://osu.ppy.sh/ss/675515700:44:565 (3,1) - The huge distance of this jump combined with the broken flow due to the slider's direction felt a bit over the top here and overall the jump felt much sharper than the others in this map (except for the one I mentioned above). I recommend moving 00:44:761 (1) - more to the left.
[Hard]
Overall I feel AR7 is a bit low for this difficulty. Maybe you increase it to 7.5?
00:09:467 (5,6,7,8) - Make the angles the same to make this pattern look more clean (aka two triangles)?
http://puu.sh/sIjZM/ee1f6641a2.jpg00:28:094 (8,9,1,2,3) - Maybe it's just me but I think the overlaps look really weird here. I am not a fan of stacking objects with circles from streams except for the start and end (in this case you stacked it with the middle of a triplet) because it makes the pattern look rather cluttered. If you keep it I would also stack (9) and (3) for more clean visuals and consistency with 00:31:427 (8,1,2,3) -
00:36:918 (1,1,1,1) - I would remove the 2nd and 4th NC because it is rather spammy and you have a lot of long combos in the map so this will make the drain rather messy. Even though all of the sliders have a new SV, it will still be readable with only every 2nd one being NC'd.
00:49:467 (1,1,1,1) - Same as above.
00:51:820 (1) - This NC kinda doesn't make sense with your NC pattern.
[Normal]
The circle-slider-ratio is extremely low compared to the other difficulties. It makes sense because there are a lot of slider-based patterns, but you could probably replace some of the sliders at the very beginning 00:00:840 (1,2,3,4,1,2,3) - with circles for more variety.
00:36:918 (1,1,2,1) - Why does the SV not change for 00:37:702 - but for the others? Also it looks weird to have the 3rd one not NC'd, imo. Overall these SV changes are so subtle that it would be enough to NC only the first one, or only the first and third one, for similar reasons as in Hard.
00:49:467 (1,1,2,1) - Same here.
[Easy]
00:38:487 (1,2) - Really, really minor, but maybe you could copy and then flip (1) both vertically and horizontally to create (2)? Currently they are just flipped horizontally which makes the heads a bit closer together than the tails. Doesn't really look intended, but maybe it's just me xD
00:51:036 (1,2) - Same as above.
Cool stuff, especially the lower diffs. The higher diffs could use some more polish imo, but that's what mods are for. Good luck! :3